CVE-2026-25550
CriticalCVSS 9.8Exploitation Probability (EPSS)
Elevated risk50th percentile - higher than 50% of all known CVEs
Summary
Seagull Software BarTender versions 2010, 2016, and 2019 contain an unauthenticated remote code execution vulnerability in the .NET Remoting service on TCP port 7375 (BtSystem.Service.exe). The service registers an unauthenticated singleton endpoint with BinaryServerFormatterSinkProvider and TypeFilterLevel set to Full. A remote attacker can exploit .NET Remoting object unmarshalling to read/write arbitrary files or coerce NTLMv2 authentication, leading to credential disclosure and code execution. The service runs as NT AUTHORITY\SYSTEM.
Risk Assessment
An attacker can gain full system control as SYSTEM, steal credentials, and perform lateral movement in the network.
Recommendation
Apply patches provided by Seagull Software for BarTender. Restrict access to TCP port 7375 to trusted hosts only and consider disabling the .NET Remoting service if not required.
Original NVD description (English source)
Seagull Software BarTender 2010, 2016, and 2019 contain an unauthenticated remote code execution vulnerability in the .NET Remoting service exposed on TCP port 7375 via BtSystem.Service.exe. The service registers an unauthenticated singleton endpoint — BarTenderSystem for BarTender 2016 <= R9, and DataServiceSingleton for BarTender 2019 <= R10 — configured with BinaryServerFormatterSinkProvider and TypeFilterLevel set to Full. An unauthenticated remote attacker can exploit .NET Remoting object unmarshalling to read or write arbitrary files on the server using the .NET WebClient class, or coerce NTLMv2 authentication by supplying a UNC path to an attacker-controlled server, enabling sensitive credential disclosure, remote code execution, or lateral movement depending on service account privileges and network environment. The service runs in the context of NT AUTHORITY\SYSTEM.